How to find voltage drop

How to find voltage drop using ohm's law:-

In this tutorial i will teach you how to find voltage drop across any resistance if we know about current and resistance.
For that we need ohm's law,
it states that voltage across any resistor equal to the product of curent passing through that resistor and the resistance of that resistor.

It is represented as:-

                         V=I*R
where
I : is the current passing through that resistor  
V: is voltage applied to that resistor
R: resistance of that resistor

 
  Lets take an example:-
If we have a resistor of 1K means of 1 kilo ohm, and current passing through that resistor is of 1mA means 1 mili amphere,
then to find voltage drop.
Using ohm's Law to find voltage drop
we have two parameters thats is current (I) and Resistance (R)
we can find third parameter which is voltage (V)
So putting value in ohm's equation

                    V=I*R
                    V=1mA*1K
                    V=1Volt

Thats the answer, 1V drop across the resistor.
This is a very simple example to find voltage drop, this is the basic you can find voltage drop of complex circuits where there are so many resistance connected in series and in parallel, by solving these these parallel and series circuits you get only a circuit like above, from here you can find voltage drop across resistance.

Hope you understand this tutorial about finding voltage across any resistance if you found any difficulty, please let me now through comments. :)